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>Video for Linux Two API Specification: Revision 0.24</TH
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><H1
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NAME="V4L2-PIX-FMT-YUV411P"
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>V4L2_PIX_FMT_YUV411P ('411P')</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN5323"
></A
><H2
>Name</H2
><CODE
CLASS="CONSTANT"
>V4L2_PIX_FMT_YUV411P</CODE
>&nbsp;--&nbsp;Format with &frac14; horizontal chroma resolution,
also known as YUV 4:1:1. Planar layout as opposed to
<CODE
CLASS="CONSTANT"
>V4L2_PIX_FMT_Y41P</CODE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN5328"
></A
><H2
>Description</H2
><P
>This format is not commonly used. This is a planar
format similar to the 4:2:2 planar format except with half as many
chroma. The three components are separated into three sub-images or
planes. The Y plane is first. The Y plane has one byte per pixel. The
Cb plane immediately follows the Y plane in memory. The Cb plane is
&frac14; the width of the Y plane (and of the image). Each Cb belongs
to 4 pixels all on the same row. For example,
Cb<SUB
>0</SUB
> belongs to Y'<SUB
>00</SUB
>,
Y'<SUB
>01</SUB
>, Y'<SUB
>02</SUB
> and
Y'<SUB
>03</SUB
>. Following the Cb plane is the Cr plane,
just like the Cb plane.</P
><P
>If the Y plane has pad bytes after each row, then the Cr
and Cb planes have &frac14; as many pad bytes after their rows. In
other words, four C x rows (including padding) is exactly as long as
one Y row (including padding).</P
><DIV
CLASS="EXAMPLE"
><A
NAME="AEN5337"
></A
><P
><B
>Example 2-1. <CODE
CLASS="CONSTANT"
>V4L2_PIX_FMT_YUV411P</CODE
> 4 &times; 4
pixel image</B
></P
><DIV
CLASS="FORMALPARA"
><P
><B
>Byte Order. </B
>Each cell is one byte.
                <DIV
CLASS="INFORMALTABLE"
><P
></P
><A
NAME="AEN5343"
></A
><TABLE
BORDER="0"
FRAME="void"
CLASS="CALSTABLE"
><COL
WIDTH="2*"
ALIGN="LEFT"><COL><COL><COL><COL><TBODY
VALIGN="TOP"
><TR
><TD
>start&nbsp;+&nbsp;0:</TD
><TD
>Y'<SUB
>00</SUB
></TD
><TD
>Y'<SUB
>01</SUB
></TD
><TD
>Y'<SUB
>02</SUB
></TD
><TD
>Y'<SUB
>03</SUB
></TD
></TR
><TR
><TD
>start&nbsp;+&nbsp;4:</TD
><TD
>Y'<SUB
>10</SUB
></TD
><TD
>Y'<SUB
>11</SUB
></TD
><TD
>Y'<SUB
>12</SUB
></TD
><TD
>Y'<SUB
>13</SUB
></TD
></TR
><TR
><TD
>start&nbsp;+&nbsp;8:</TD
><TD
>Y'<SUB
>20</SUB
></TD
><TD
>Y'<SUB
>21</SUB
></TD
><TD
>Y'<SUB
>22</SUB
></TD
><TD
>Y'<SUB
>23</SUB
></TD
></TR
><TR
><TD
>start&nbsp;+&nbsp;12:</TD
><TD
>Y'<SUB
>30</SUB
></TD
><TD
>Y'<SUB
>31</SUB
></TD
><TD
>Y'<SUB
>32</SUB
></TD
><TD
>Y'<SUB
>33</SUB
></TD
></TR
><TR
><TD
>start&nbsp;+&nbsp;16:</TD
><TD
>Cb<SUB
>00</SUB
></TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>start&nbsp;+&nbsp;17:</TD
><TD
>Cb<SUB
>10</SUB
></TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>start&nbsp;+&nbsp;18:</TD
><TD
>Cb<SUB
>20</SUB
></TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>start&nbsp;+&nbsp;19:</TD
><TD
>Cb<SUB
>30</SUB
></TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>start&nbsp;+&nbsp;20:</TD
><TD
>Cr<SUB
>00</SUB
></TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>start&nbsp;+&nbsp;21:</TD
><TD
>Cr<SUB
>10</SUB
></TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>start&nbsp;+&nbsp;22:</TD
><TD
>Cr<SUB
>20</SUB
></TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
></TR
><TR
><TD
>start&nbsp;+&nbsp;23:</TD
><TD
>Cr<SUB
>30</SUB
></TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
><TD
>&nbsp;</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
>
              </P
></DIV
><DIV
CLASS="FORMALPARA"
><P
><B
>Color Sample Location. </B
>                <DIV
CLASS="INFORMALTABLE"
><P
></P
><A
NAME="AEN5422"
></A
><TABLE
BORDER="0"
FRAME="void"
CLASS="CALSTABLE"
><COL><COL><COL><COL><COL><COL><COL><TBODY
VALIGN="TOP"
><TR
><TD
>&nbsp;</TD
><TD
>0</TD
><TD
>&nbsp;</TD
><TD
>1</TD
><TD
>&nbsp;</TD
><TD
>2</TD
><TD
>&nbsp;</TD
><TD
>3</TD
></TR
><TR
><TD
>0</TD
><TD
>Y</TD
><TD
>&nbsp;</TD
><TD
>Y</TD
><TD
>C</TD
><TD
>Y</TD
><TD
>&nbsp;</TD
><TD
>Y</TD
></TR
><TR
><TD
>1</TD
><TD
>Y</TD
><TD
>&nbsp;</TD
><TD
>Y</TD
><TD
>C</TD
><TD
>Y</TD
><TD
>&nbsp;</TD
><TD
>Y</TD
></TR
><TR
><TD
>2</TD
><TD
>Y</TD
><TD
>&nbsp;</TD
><TD
>Y</TD
><TD
>C</TD
><TD
>Y</TD
><TD
>&nbsp;</TD
><TD
>Y</TD
></TR
><TR
><TD
>3</TD
><TD
>Y</TD
><TD
>&nbsp;</TD
><TD
>Y</TD
><TD
>C</TD
><TD
>Y</TD
><TD
>&nbsp;</TD
><TD
>Y</TD
></TR
></TBODY
></TABLE
><P
></P
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